White dwarf 8,000 - Search
Open links in new tab
  1. Wikipedia
    https://en.wikipedia.org › wiki › White_dwarf

    White dwarf - Wikipedia

    • Most observed white dwarfs have relatively high surface temperatures, between 8000 K and 40 000 K. [25][75] A white dwarf, though, spends more of its lifetime at cooler temperatures than at hotter temperatures, so we should expect that there are more cool white dwarfs than hot white dwarfs. See more

    Overview

    A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: … See more

    Discovery

    The first white dwarf discovered was in the triple star system of 40 Eridani, which contains the relatively bright main sequence star 40 Eridani A, orbited at a distance by the closer binary system of the white dwarf 40 Eridani B and … See more

    Composition and structure

    Although white dwarfs are known with estimated masses as low as 0.17 M☉ and as high as 1.33 M☉, the mass distribution is strongly peaked at 0.6 M☉, and the majority lie between 0.5 and 0.7 M☉. The estimated r… See more

    Variability

    Early calculations suggested that there might be white dwarfs whose luminosity varied with a period of around 10 seconds, but searches in the 1960s failed to observe this. The first variable white dwarf found was … See more

    Formation

    White dwarfs are thought to represent the end point of stellar evolution for main-sequence stars with masses from about 0.07 to 10 M☉. The composition of the white dwarf produced will depend on the initial mas… See more

    Fate

    A white dwarf is stable once formed and will continue to cool almost indefinitely, eventually to become a black dwarf. Assuming that the universe continues to expand, it is thought that in 10 to 10 years, the … See more

    Debris disks and planets

    A white dwarf's stellar and planetary system is inherited from its progenitor star and may interact with the white dwarf in various ways. There are several indications that a white dwarf has a remnant planetary system. … See more

    Wikipedia text under CC-BY-SA license
    Feedback
     
    Kizdar net | Kizdar net | Кыздар Нет
  2. Some results have been removed